难易程度：★★★★
题目题材：医药
gre argument 57题目：
The following appeared in a newsletter on nutrition and health.
"Although the multimineral Zorba pill was designed as a simple dietary supplement, a study of first-time ulcer patients who took Zorba suggests that Zorba actually helps prevent ulcers. The study showed that only 25 percent of those ulcer patients who took Zorba(2) under a doctor's direction developed new ulcers, compared to a 75 percent recurrence rate among ulcer patients who did not take Zorba(1). Clearly, then, Zorba will be highly effective in preventing recurrent ulcers and if health experts inform the general public of this fact, many first-time ulcers(3) can be prevented as well."
提纲：
(1)There may be many other differences between patients who took Zorba and who do not.
(2)The patients who took Zorba mentioned by the study may not be representative of the whole group of patients who took Zorba.
(3)No evidence about the effect of Zorba on preventing first-time ulcers is provided.
注：题目中括号里的数字表明这句话体现的是提纲中第几号缺陷。
无论是GRE issue还是GRE argument，考生都应该养成写提纲的习惯。这种提纲式的gre写作练习可以帮助考生锻炼写作的逻辑性，而gre写作高分最重要的得分依据就是作文的逻辑性要强。
